Add non-regression test states and Bluetooth diagnostic script

- Introduced a new JSON file containing non-regression test states with detailed unit information, including positions, ages, and movement directions across multiple frames.
- Added a shell script for Bluetooth diagnostics that checks system information, Bluetooth binaries, running processes, D-Bus status, Bluetooth controller details, and audio stack status, providing a comprehensive overview for troubleshooting.

units/rat.py

@@ -93,7 +93,7 @@ class Rat(Unit):
         sex = self.sex if self.age > AGE_THRESHOLD else "BABY"
         
         # Get cached image size instead of calling get_image_size()
-        image_size = self.game.rat_image_sizes[sex][self.direction]
+        image_size = self.game.graphics.rat_image_sizes[sex][self.direction]
         
         # Calculate partial movement offset
         if self.direction in ["UP", "DOWN"]:
@@ -130,7 +130,7 @@ class Rat(Unit):
         
         # Process each collision
         for _, other_id in collisions:
-            other_unit = self.game.get_unit_by_id(other_id)
+            other_unit = self.game.unit_manager.get_unit_by_id(other_id)
             
             # Skip if not another Rat
             if not isinstance(other_unit, Rat):
@@ -164,17 +164,17 @@ class Rat(Unit):
         
         # Rat-specific behavior: spawn points
         if score not in [None, 0]:
-            self.game.add_point(score)
-            self.game.spawn_unit(Point, death_position, value=score)
+            self.game.scoring.add_point(score)
+            self.game.unit_manager.spawn_unit(Point, death_position, value=score)
 
         # Add blood stain directly to background
-        self.game.add_blood_stain(death_position)
+        self.game.graphics.add_blood_stain(death_position)
 
     def draw(self):
         """Optimized draw using pre-calculated positions from move()"""
         sex = self.sex if self.age > AGE_THRESHOLD else "BABY"
-        image = self.game.rat_assets_textures[sex][self.direction]
-        image_size = self.game.rat_image_sizes[sex][self.direction]
+        image = self.game.graphics.rat_assets_textures[sex][self.direction]
+        image_size = self.game.graphics.rat_image_sizes[sex][self.direction]
         
         # Calculate render position if not yet set (first frame)
         if not hasattr(self, 'render_x'):
@@ -275,7 +275,7 @@ class Rat(Unit):
         """Calculate render position and bbox (used when render_x not yet set)"""
         sex = self.sex if self.age > AGE_THRESHOLD else "BABY"
         image_size = self.game.render_engine.get_image_size(
-            self.game.rat_assets_textures[sex][self.direction]
+            self.game.graphics.rat_assets_textures[sex][self.direction]
         )
         
         partial_x, partial_y = 0, 0
@@ -314,7 +314,7 @@ class Female(Rat):
             self.babies -= 1
             self.stop = 20
             if self.partial_move > 0.2:
-                self.game.spawn_rat(self.position)
+                self.game.unit_manager.spawn_rat(self.position)
             else:
-                self.game.spawn_rat(self.position_before)
+                self.game.unit_manager.spawn_rat(self.position_before)
             self.game.render_engine.play_sound("BIRTH.WAV")